DE1533270B2 - Process for the production of a low-alloy iron powder - Google Patents
Process for the production of a low-alloy iron powderInfo
- Publication number
- DE1533270B2 DE1533270B2 DE19661533270 DE1533270A DE1533270B2 DE 1533270 B2 DE1533270 B2 DE 1533270B2 DE 19661533270 DE19661533270 DE 19661533270 DE 1533270 A DE1533270 A DE 1533270A DE 1533270 B2 DE1533270 B2 DE 1533270B2
- Authority
- DE
- Germany
- Prior art keywords
- iron
- powder
- nickel
- copper
- molybdenum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0235—Starting from compounds, e.g. oxides
Description
3 43 4
Teilchen zu Agglomeraten, die vermählen werden, Nach dem Vermischen wird gegebenenfalls gewas jedoch zu einer Härtung der Teilchen führt. Um trocknet und dann in der reduzierenden Atmosphäre deren Weichheit wieder zu erlangen und damit ihre vorlegiert. Als reduzierende Atmosphäre kommen Verpreßbarkeit zu verbessern, werden die gemalenen zweckmäßig Wasserstoff oder dissoziiertes Ammoniak Teilchen nochmals während etwa 30 Minuten bei- 5 in Betracht. Zu Beginn des Erhitzens ist die Redukspielsweise auf 732° C erhitzt. Dabei findet eine nur tionswirkung zu schwach, um etwa vorhandenes geringe Agglomerierung statt, so daß eine einfache Molybdäntrioxid zu reduzieren, so daß dieser Stoff Behandlung oder ein Sieben ausreicht, um die er- zunächst bei etwa 538° C verdampft und sich die gewünschte Teilchengröße von etwa 177 μΐη und weni- samte Masse gleichmäßig ausbreitet. In der Dampfger zu bekommen. io phase wird das Molybdäntrioxid gleich zu MolybdänParticles to agglomerates, which are ground, after mixing is optionally washed however, leads to hardening of the particles. To dry and then in the reducing atmosphere to regain their softness and thus present theirs. Come as a reducing atmosphere To improve compressibility, the painted are expediently hydrogen or dissociated ammonia Particles again for about 30 minutes into consideration. At the beginning of the heating is the Redukspielweise heated to 732 ° C. There is only one tion effect too weak to possibly exist low agglomeration instead, so that a simple molybdenum trioxide to reduce, so that this substance Treatment or sieving is sufficient to initially evaporate at around 538 ° C and obtain the desired Particle size of about 177 μm and little mass spreads evenly. In the steamer to get. In phase, the molybdenum trioxide becomes molybdenum
Das Molybdän wird zugesetzt, um die Festigkeit reduziert, das sich dann auf der Oberfläche des Eisen-The molybdenum is added to reduce the strength that is then deposited on the surface of the iron
und die Härtbarkeit des Eisens zu verbessern. Das pulvers niederschlägt. Das frisch reduzierte Molybdänand to improve the hardenability of iron. The powder precipitates. The freshly reduced molybdenum
Nickel dient ebenfalls in geringem Maße der Festig- verbindet sich leicht mit dem Eisen und diffundiertNickel also serves to a lesser extent for strength- it easily combines with iron and diffuses
keitsverbesserung und verleiht dem Eisen Zähigkeit. in dieses.Improvement of ability and gives the iron toughness. in this.
Das Kupfer wird zugesetzt, um die Festigkeit, vor 15 Die anderen Legierungsbestandteile, die normalerallem aber die Korrosionsbeständigkeit zu verbessern. weise eine oxidierte Oberfläche besitzen, werdenThe copper is added to maintain strength, before 15 The other alloy components are normal to everything but to improve the corrosion resistance. wise have an oxidized surface
Das Nickel verursacht eine starke Schrumpfung, ebenfalls reduziert und besitzen in diesem frisch redie nur teilweise durch das Molybdän kompensiert duzierten Zustand ebenfalls eine starke Neigung, sich wird. Das Kupfer in den obengenannten Mengen miteinander zu verbinden und in das Eisen zu diffunsetzt jedoch das Schrumpfen auf ein Minimum herab, so dieren. Die Dauer des Vorlegierens bei 732 bis so daß die Sinterkörper in ihren Dimensionen nur 1010° C liegt gewöhnlich bei 15 bis 60 Minuten. Bei sehr wenig gegenüber der ungesinterten Form vari- niedrigeren Temperaturen ist eine längere Erhitzungsieren, zeit erforderlich. Bei 10100C reichen 30 MinutenThe nickel causes a strong shrinkage, also reduced and in this freshly reduced state, which is only partially compensated by the molybdenum, also has a strong tendency to become. Combining the copper in the abovementioned amounts and diffusing it into the iron, however, reduces shrinkage to a minimum, so dieren. The duration of the pre-alloying at 732 to so that the dimensions of the sintered bodies are only 1010 ° C. is usually 15 to 60 minutes. If the temperatures vary very little compared to the unsintered form, a longer heating time is required. At 1010 ° C., 30 minutes are sufficient
Als Eisenpulver kann zweckmäßig solches verwen- aus, um die Kompressibilität des Pulvers wesentlichThe iron powder used can expediently be used in order to increase the compressibility of the powder
det werden, das durch Reduktion von Eisenerz ent- 25 zu vermindern.This can be reduced by reducing iron ore.
steht, da dieses eine große Oberfläche besitzt. Zweck- Nach dem Vorlegieren wird das Pulver auf die ermäßig
enthält das Eisenpulver noch etwa 0,40 bis wünschte Teilchengröße von 200 μπι oder weniger
0,50% unreduziertes Eisenoxid, das die augenblick- vermählen und sodann beispielsweise bei etwa
liehe Reduktion des Molybdäntrioxids verhindert. 732° C erneut geglüht. Das Eisenpulver ist nun fertig
Das Eisenpulver wird mit den Legierungsbestand- 30 für die pulvermetallurgische Herstellung von Formteilen
trocken oder feucht in üblicher Weise ver- körpern und besitzt beispielsweise folgende Eigenmischt,
z. B. in Mischtrommeln, Kugelmischern, schäften:
Mühlen usw. Dabei können kleine Mengen an Öl _,. _ .. „„ Ao-mu-r. «1*. λ ο stands because this has a large surface. Purpose- After pre-alloying, the powder is reduced to the iron powder still contains about 0.40 to the desired particle size of 200 μm or less 0.50% unreduced iron oxide, which grinds the instant and then prevents, for example, a reduction in molybdenum trioxide. Annealed again at 732 ° C. The iron powder is now ready. The iron powder is embodied with the alloy constituents dry or wet in the usual way for the powder-metallurgical production of molded parts and has the following self-mixed, for example: B. in mixing drums, ball mixers, shafts:
Mills, etc. Small amounts of oil can be used. _ .. "" Ao-mu-r. "1*. λ ο
oder an ähnlichen Stoffen zugesetzt werden, um die Fließvermogen 33 sec. ASTM B 213-48or similar substances are added to the flowability 33 sec. ASTM B 213-48
Staubbildung niedrig zu halten. Auch können kohlen- 35 Fulldicnte 2,3 bis 2,6 g/cm»To keep dust formation low. Carbon fiber weights of 2.3 to 2.6 g / cm »
stoffhaltige Zusätze, wie Graphit oder Stearinsäure, in Grünfestigkeit 140 kg/cm2«Substance-containing additives, such as graphite or stearic acid, with a green strength of 140 kg / cm 2 «
einer Menge von etwa Va % zugegeben werden, um Feinanteil 20 % mit max 44 μπιan amount of about Va% to be added to fine fraction 20% with max 44 μπι
die Reduktion während des Vorlegierens zu erleich- Kompressibilität 6,2 g/cm3 Dichte nachthe reduction during the pre-alloying to make it easier compressibility 6.2 g / cm 3 density after
tern. 4,65 t/cm2« Preßdrucktern. 4.65 t / cm 2 «pressing pressure
Claims (1)
zeichnet, daß Eisenpulver mit den übrigen Die bevorzugten Mengenbereiche der Legierungs-Process for the production of a low alloy up to 60 minutes and grinding of the agglomerated iron powder for powder metallurgical production 5 particles is characterized in that iron powder position of molded bodies by pre-alloying with the other alloy components in the form of a mixture of an iron-containing powder with very finely divided powder or in the form Dissolved compound nickel or a nickel compound and copper fertilize in such a mixing ratio of a copper compound and a molybdenum that the alloyed iron powder is 1.50 to a Danish compound in a reducing atmosphere 2.00% nickel, 0.40 to 1.00% molybdenum and 0.50 sphere at a temperature of 732 to 1010 ° C to 2.00% copper, and after grinding for 15 to 60 minutes and grinding is annealed at a temperature that did not agglomerate higher Particles, characterized as the temperature of the pre-alloying.
draws that iron powder with the rest of the The preferred quantity ranges of the alloy
einem solchen Mischungsverhältnis vorlegiert Die Verwendung von feinverteiltem Nickel undAlloy components in the form of very finely divided 15 elements are 1.7 to 2.0% nickel, 0.40 to powder or in the form of dissolved compounds in 0.60% molybdenum and 1.40 to 1.60% copper,
The use of finely divided nickel and prealloyed in such a mixing ratio
höher liegt als die Temperatur des Vorlegierens. Wenn man die Legierungselemente in der FormIt is found that the alloyed iron powder gives 1.50 to 2.00% molybdenum a high degree of diffusion die-nickel, 0.40 to 1.00% molybdenum and 0.50 to these elements into the iron despite the low diffusion 2 , 00% copper, and after grinding 20 sion speeds at the temperatures of the annealing at a temperature that does not pre-alloying of 732 to 1010 ° C.
higher than the pre-alloying temperature. If you put the alloy elements in the shape
1152 121 erhält man gesinterte Preßkörper aus Das Nickel kann auch in der Form von Nickelcar-From the German Auslegeschrift 1125 459 a fine particle of less than 5 μπι is available and processes for the production of alloyed powder can be used in this form. Molybdenum iron base for powder metallurgical production is expediently known in the form of molybdenum dioxide, from molded bodies in which an iron-containing powder with alloy elements that is partially oxidized in addition to molybdic acid or ammonium molybdate. The trioxide evaporates below about th such as copper, "tungsten, molybdenum, manganese and / 538 ° C and condenses in extremely fine distribution or nickel mixed, finely ground and in an on the iron. The copper can be in the form of reducing atmosphere wherein the master alloy is Siert so. According to the German Auslegeschrift is better the finer the copper is dispersed are heated to a temperature of 35 finely divided elemental copper or copper oxide 700 to 1000 0 C and then added again pulveri-.
1152 121 one obtains sintered compacts from The nickel can also be in the form of nickel car-
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48731565A | 1965-09-14 | 1965-09-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1533270A1 DE1533270A1 (en) | 1969-12-18 |
DE1533270B2 true DE1533270B2 (en) | 1974-01-17 |
Family
ID=23935240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19661533270 Ceased DE1533270B2 (en) | 1965-09-14 | 1966-09-10 | Process for the production of a low-alloy iron powder |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1533270B2 (en) |
GB (1) | GB1162702A (en) |
SE (1) | SE334244B (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54104406A (en) * | 1978-02-06 | 1979-08-16 | Toyo Kohan Co Ltd | Production of high temperature abrasion resistant sintered alloy steel |
USRE30855E (en) | 1978-10-23 | 1982-01-26 | Pitney Bowes Inc. | Powder metal composition |
US4170474A (en) * | 1978-10-23 | 1979-10-09 | Pitney-Bowes | Powder metal composition |
SE453733B (en) * | 1985-03-07 | 1988-02-29 | Hoeganaes Ab | IRON-BASED POWDER FOR HOGHALLFASTTA SINTRADE BODIES |
JPH0745683B2 (en) * | 1987-09-30 | 1995-05-17 | 川崎製鉄株式会社 | Composite steel powder with excellent compressibility and homogeneity |
DE4001900A1 (en) * | 1990-01-19 | 1991-07-25 | Mannesmann Ag | METAL POWDER MIXING |
DE4001899C1 (en) * | 1990-01-19 | 1991-07-25 | Mannesmann Ag, 4000 Duesseldorf, De | |
US5330792A (en) * | 1992-11-13 | 1994-07-19 | Hoeganaes Corporation | Method of making lubricated metallurgical powder composition |
SE9401623D0 (en) * | 1994-05-09 | 1994-05-09 | Hoeganaes Ab | Sintered products having improved density |
US6068813A (en) * | 1999-05-26 | 2000-05-30 | Hoeganaes Corporation | Method of making powder metallurgical compositions |
JP3651420B2 (en) | 2000-08-31 | 2005-05-25 | Jfeスチール株式会社 | Alloy steel powder for powder metallurgy |
US7261759B2 (en) * | 2001-05-21 | 2007-08-28 | React-Nti, Llc | Powder metal mixture including micronized starch |
US7309374B2 (en) * | 2005-04-04 | 2007-12-18 | Inco Limited | Diffusion bonded nickel-copper powder metallurgy powder |
CA2673774C (en) | 2006-12-29 | 2015-12-01 | Mats Larsson | Powder, method of manufacturing a component and component |
CN101680063B (en) * | 2007-06-14 | 2013-06-19 | 霍加纳斯股份有限公司 | Iron-based powder and composition thereof |
CN102407336A (en) * | 2010-09-25 | 2012-04-11 | 李国平 | Method for preparing partially pre-alloyed iron powder by short process |
CN103008651A (en) * | 2013-01-15 | 2013-04-03 | 湖南顶融科技有限公司 | Copper iron tin powder composition and preparation method thereof |
CN108779523A (en) | 2016-03-23 | 2018-11-09 | 霍加纳斯股份有限公司 | Iron-based powder |
-
1966
- 1966-09-07 GB GB4004666A patent/GB1162702A/en not_active Expired
- 1966-09-08 SE SE1212366A patent/SE334244B/xx unknown
- 1966-09-10 DE DE19661533270 patent/DE1533270B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
SE334244B (en) | 1971-04-19 |
DE1533270A1 (en) | 1969-12-18 |
GB1162702A (en) | 1969-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
SH | Request for examination between 03.10.1968 and 22.04.1971 | ||
BHV | Refusal |